Malicious PDF — malware analysis report

Static analysis result for SHA-256 230e413f2da329fd…

MALICIOUS

PDF

115.6 KB Created: 2021-07-21 17:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 08cbbcb1dfeaea7a670f6ccc56c36474 SHA-1: f6b3996f421cdc6c84aa01a50e175ae9d8df8843 SHA-256: 230e413f2da329fd9265e2e2a702abc1caa51a9e37ad9f50f15f38ff51f01d83
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript suggests it may be used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c628bcb07d1---roputepanuzewugigivosu.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/kgg0kj4erq0u9cimvober5fvu6/mumutidalu.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/6cq86nb06fatb8csh9h7rcot05/79459312311.pdf
    • http://eurogeographyjournal.eu/admin/fckfiles/file/67937364690.pdf
    • http://eprdel.cz/userfiles/file/61800419865.pdf
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/40ed8cdcab380d50c166cf789fe9ef74/fozasirew.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c487ab9ba24---79977836969.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a43790e76ec---13216446783.pdf
    • http://hkxhjfc.ltd/uploads/files/20210709195045.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/0d484a6926d49b59ac5c16611372baea/vobulogin.pdf
    • http://traslochimontalto.it/userfiles/files/nekizedapoxa.pdf
    • http://maezawa-jidousha.com/js/upload/files/wovuxamosoj.pdf
    • https://betenrealestate.com/sites/default/files/file/jugiremifixikafe.pdf
    • http://blevy.com/ckfinder/userfiles/files/99205409868.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075861f3b321---37061529872.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/fljjm5uobb53nbokim6bjngki0/82919919491.pdf
    • http://baohanhranghm.com/upload/img/files/piniruganut.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/a0c6d2ae17cd64bc0bf75c942fd6c22e/vanusidosazivowizavarire.pdf
    • https://liniagdanskzydowo.pl/files/josibepibafe.pdf
    • https://osiindia.org/ckfinder/userfiles/files/tanekolarazoduwole.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/raap2a7jprs0ugqpg62e30mj25/95116203107.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608a892d715aa---lusowuramusesesusodot.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+not+break+your+fast
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014c52.bin
fdc3f250e16d4eeaac0151c08e1678493ac6cc67090af3137bc700c4cd553891
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C52 16348 bytes
font_01_sfnt_off000162aa.bin
3aefca3c6d472d2c7083ee6eccafc94d7ce1adb6494cdc5a1ea72abb931c7617
pdf-font-stream PDF embedded font (sfnt) at offset 0x162AA 10592 bytes
font_02_sfnt_off00017b0f.bin
8787bdaec515d9a840c2fabb8e2402c8157ae5abefea3fd10862f464467d4357
pdf-font-stream PDF embedded font (sfnt) at offset 0x17B0F 17516 bytes
font_03_sfnt_off0001a7cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7CC 16792 bytes